The ESP8266 comes with modem simulator firmware, but it's confusing, verbose, and lacks a lot of the features that would make the ESP really look like a modem to a client computer. This project attempt to fix all those flaws with a custom Arduino implementation of that software.


  • Your configuration can be saved to chip storage.
  • Supports multiple independent client connections
  • Includes "Stream Mode" client with TELNET codes
  • Supports PETSCII translation in Stream Mode
  • Supports all standard Hayes commands
  • Supports XON/XOFF flow control.

Project Activity

See All Activity >


Follow Zimodem

Zimodem Web Site

Other Useful Business Software

Identify and respond to threats before damage is done Icon
Identify and respond to threats before damage is done Icon

A SIEM that makes it easy to use logs for security, compliance, and troubleshooting.

SolarWinds® Log & Event Manager (LEM) delivers comprehensive Security Information and Event Management (SIEM) capabilities in a highly affordable, easy-to-use, and quick-to-deploy virtual appliance. LEM provides the visibility, security, and control that IT professionals need to alert on and respond to security threats, and assist in meeting the regulatory compliance guidelines of HIPAA, PCI DSS, SOX, and more. Try it FREE for 30 days!

Rate This Project

Login To Rate This Project

User Reviews

Be the first to post a review of Zimodem!

Additional Project Details